Safety-vent



M. WIGET.

SAFETY VENT. APPLICATION FILED MAY 24, I9I9.

Patented oet, 25, 19in.`

ra 'rats arent MARIO WIGET, OF NEW' YORK, N. Y.

SAFETY-VENT.

incarna.

- Application filed May 24,

To all fw 710m it 'may concern.'

Be it known that I, MARIO VIGET, a citizen of the Republic of Switzerland, residing' at New York, New York county, New York State, have invented certain new and useful Improvements in Safety-Vents, of which the following is a specification.

This invention relates to safety vents for tanks containing' volatile and inflammable fluids and is adapted to allow the expansion of the fluid and the escape of gras generated therefrom, and the object of the invention is to prevent the entrance of flame to the tank by means of a valve or barrier adapted to be raised by the gas pressure and by gauze or perforated metal caps which are preserved against damage by the dislocated barrier. as will be more fully described in the following' specification, set forth in the appended claim and illustrated in the accompanying drawings, wherein rlChe figure is a vertical sectional view of the vent as used in a large tank.

Ehe device as applied to tanks containing` liquids adapted to blow off when pressure occurs is provided with a gauze cover to prevent the return of flame to the tank and a barrier consisting of an automatic spring controlled valve that will easily give way when pressure of a certain degree is applied.

In the form of the device as applied to large tanks a sleeve 5, threaded on the inside, is secured by rivets or welded to the tank 6 about and within an appropriate sized opening` and has about its lower edge the flange 7 to carry a basket or strainer 8 that extends downward into the tank. This basket 8 is of gauze or perforated metal tov prevent the introduction of impurities and dirt into the tank.

Within the sleeve 5 is secured a thimble 14 with a polygonal head 15 and carrying a cage 16 of tine mesh and extending upward beyond the tank and has at its lower edge a ring 17 to which is hinged a valve 18. The

Speccation of Letters Patent.

Patented Oct. 25, 1921.

1919. serial No. 299,643.

ring 17 also carries a depending rod 17 carrying a boX 9 at its lower end and which extends into the strainer 8 to house a spiral spring 11 one end of which is secured to the arbor 10 with a square end for a wrench or key and carrying a ratchet wheel 12 held against retrograde movement by the ratchet wheel and pawl 13. The outer end of the spring 11 is connected with the valve 18 by a link 19, or the spring itself may be of sufficient length to connect direct with the valve to normally keep it closed but permit it to rise when undue pressure occurs but this action is controlled by the adjustment of the ratchet wheel 12 as above described. The open valve is shown in dotted lines and the whole of this mechanism may be removed by simply unscrewing the thimble 14 and lifting it out when the tank may be refilled, the dirt removed from the basket 8 or the spring and valve adjusted.

1t is obvious that various modifications of the device illustrated and described may be resorted to without departing from the essential features above described or from the scope of the appended claim.

What I claim as new is:

1n safety vents the combination of a tank, a sleeve fitted in a wall thereof and providing a vent opening, a perforated cap above the sleeve, a valve beneath the outlet opening of the vent, a strainer below the valve, a spring carried by the sleeve and located within the tank, a connection between the spring and the valve, and means for adjusting the tension of the spring.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this 15 day of May, 1919.

MARIO wiser.

Witnesses:

A; U. BAKER, JAMES F. DUHAMEL. 

